20010220100009 has 2 divisors, whose sum is σ = 20010220100010. Its totient is φ = 20010220100008.

The previous prime is 20010220099931. The next prime is 20010220100033. The reversal of 20010220100009 is 90000102201002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10644539184409 + 9365680915600 = 3262597^2 + 3060340^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20010220100009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20010220100009.

It is not a weakly prime, because it can be changed into another prime (20010220100209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005110050004 + 10005110050005.

It is an arithmetic number, because the mean of its divisors is an integer number (10005110050005).

Almost surely, 2^{20010220100009} is an apocalyptic number.

It is an amenable number.

20010220100009 is a deficient number, since it is larger than the sum of its proper divisors (1).

20010220100009 is an equidigital number, since it uses as much as digits as its factorization.

20010220100009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

The spelling of 20010220100009 in words is "twenty trillion, ten billion, two hundred twenty million, one hundred thousand, nine".